Lock



FIG. 1 is a front perspective view of a lock showing the new design;

FIG. 2 is a front view of the lock of FIG. 1;

FIG. 3 is a rear view of the lock of FIG. 1;

FIG. 4 is a top view of the lock of FIG. 1;

FIG. 5 is a bottom view of the lock of FIG. 1;

FIG. 6 is a left side view of the lock of FIG. 1; and,

FIG. 7 is a right side view of the lock of FIG. 1.

The broken lines, which define the bounds of the claimed design, form no part thereof. The broken lines environment is for illustrative purpose only and forms no part of the claimed design. 

We claim the ornamental design for a lock, as shown and described. 